Question

When carbon dioxide dissolves in water, it undergoes a multistep equilibrium process, with Koverall = 4.5x10⁻⁷, which is simplified to the following:(c) What is [CO₃²⁻] in rainwater (Ko of HCO₃⁻ = 4.7 × 10⁻¹¹) ?

Answer 1

The extensive acid electricity of intact carbonic acid suggests that it is an essential protonation agent below physiological conditions.

Why is CO2 an acid?

CO2 is not an acid itself, considering it does no longer incorporate ions of hydrogen (H+). CO2 becomes carbonic acid in water.

Carbonic acid (H2CO3) is a weak, H+-splitting acid. Carbonic acid, a weak acid that acidifies the solution, is formed when some of the carbon dioxide dissolves in the water.

How do you measure HCO3 in water?

Since pH = -log [H+], [H+] = 10 to the poor pH. We can use this data and some algebra to rewrite the equation as [HCO3-] = ( two x whole alkalinity ) - ( 10 to the (-14 + pH) ) / ( 1 + 2K2 x 10 to the pH).

Learn more about carbonic acid here:

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